go-sqlite3/sqlite3_test/sqltest.go

package sqlite3_test

import (
	"database/sql"
	"fmt"
	"math/rand"
	"regexp"
	"strconv"
	"sync"
	"testing"
	"time"
)

type Dialect int

const (
	SQLITE Dialect = iota
	POSTGRESQL
	MYSQL
)

type DB struct {
	*testing.T
	*sql.DB
	dialect Dialect
	once    sync.Once
}

var db *DB

// the following tables will be created and dropped during the test
var testTables = []string{"foo", "bar", "t", "bench"}

var tests = []testing.InternalTest{
	{"TestBlobs", TestBlobs},
	{"TestManyQueryRow", TestManyQueryRow},
	{"TestTxQuery", TestTxQuery},
	{"TestPreparedStmt", TestPreparedStmt},
}

var benchmarks = []testing.InternalBenchmark{
	{"BenchmarkExec", BenchmarkExec},
	{"BenchmarkQuery", BenchmarkQuery},
	{"BenchmarkParams", BenchmarkParams},
	{"BenchmarkStmt", BenchmarkStmt},
	{"BenchmarkRows", BenchmarkRows},
	{"BenchmarkStmtRows", BenchmarkStmtRows},
}

// RunTests runs the SQL test suite
func RunTests(t *testing.T, d *sql.DB, dialect Dialect) {
	db = &DB{t, d, dialect, sync.Once{}}
	testing.RunTests(func(string, string) (bool, error) { return true, nil }, tests)

	if !testing.Short() {
		for _, b := range benchmarks {
			fmt.Printf("%-20s", b.Name)
			r := testing.Benchmark(b.F)
			fmt.Printf("%10d %10.0f req/s\n", r.N, float64(r.N)/r.T.Seconds())
		}
	}
	db.tearDown()
}

func (db *DB) mustExec(sql string, args ...interface{}) sql.Result {
	res, err := db.Exec(sql, args...)
	if err != nil {
		db.Fatalf("Error running %q: %v", sql, err)
	}
	return res
}

func (db *DB) tearDown() {
	for _, tbl := range testTables {
		switch db.dialect {
		case SQLITE:
			db.mustExec("drop table if exists " + tbl)
		case MYSQL, POSTGRESQL:
			db.mustExec("drop table if exists " + tbl)
		default:
			db.Fatal("unkown dialect")
		}
	}
}

// q replaces ? parameters if needed
func (db *DB) q(sql string) string {
	switch db.dialect {
	case POSTGRESQL: // repace with $1, $2, ..
		qrx := regexp.MustCompile(`\?`)
		n := 0
		return qrx.ReplaceAllStringFunc(sql, func(string) string {
			n++
			return "$" + strconv.Itoa(n)
		})
	}
	return sql
}

func (db *DB) blobType(size int) string {
	switch db.dialect {
	case SQLITE:
		return fmt.Sprintf("blob[%d]", size)
	case POSTGRESQL:
		return "bytea"
	case MYSQL:
		return fmt.Sprintf("VARBINARY(%d)", size)
	}
	panic("unkown dialect")
}

func (db *DB) serialPK() string {
	switch db.dialect {
	case SQLITE:
		return "integer primary key autoincrement"
	case POSTGRESQL:
		return "serial primary key"
	case MYSQL:
		return "integer primary key auto_increment"
	}
	panic("unkown dialect")
}

func (db *DB) now() string {
	switch db.dialect {
	case SQLITE:
		return "datetime('now')"
	case POSTGRESQL:
		return "now()"
	case MYSQL:
		return "now()"
	}
	panic("unkown dialect")
}

func makeBench() {
	if _, err := db.Exec("create table bench (n varchar(32), i integer, d double, s varchar(32), t datetime)"); err != nil {
		panic(err)
	}
	st, err := db.Prepare("insert into bench values (?, ?, ?, ?, ?)")
	if err != nil {
		panic(err)
	}
	defer st.Close()
	for i := 0; i < 100; i++ {
		if _, err = st.Exec(nil, i, float64(i), fmt.Sprintf("%d", i), time.Now()); err != nil {
			panic(err)
		}
	}
}

func TestResult(t *testing.T) {
	db.tearDown()
	db.mustExec("create temporary table test (id " + db.serialPK() + ", name varchar(10))")

	for i := 1; i < 3; i++ {
		r := db.mustExec(db.q("insert into test (name) values (?)"), fmt.Sprintf("row %d", i))
		n, err := r.RowsAffected()
		if err != nil {
			t.Fatal(err)
		}
		if n != 1 {
			t.Errorf("got %v, want %v", n, 1)
		}
		n, err = r.LastInsertId()
		if err != nil {
			t.Fatal(err)
		}
		if n != int64(i) {
			t.Errorf("got %v, want %v", n, i)
		}
	}
	if _, err := db.Exec("error!"); err == nil {
		t.Fatalf("expected error")
	}
}